Scratch-gage



l. LIPPERT.

SCRATCH GAGE.

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PatentedSept. 23,1919.

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JOSEPH LIPPERT, OF BROOKLYN, NEW YORK.

SCRATCH- GAGE.

Specification of Letters Patent.

Patented Sept. 23, 1919.

Application led November 20, 1918. Serial No. 263,260.

b all whom t may concern Be it known that I, JOSEPH Lirrnn'r, a citizenof the United States, residing at Brooklyn, county of Kings, and Stateof New York, have invented certain new and useful ImprovementsinScratch-Gages, of which the following is a specification.

This invention relates to improvements in scratch gages and has as itsspecial object the provision of a device in which a movable bar isspring clamped when in an adjusted position and provided with a markingor scratching means of novel form.

A further object is to provide a device of the class described of anattractive design, which may be operated without screws or clampingmeans ordinarily employed.

These and other like objects are attained by the novel construction andcombination of parts hereinafter described and shown in the accompanyingdrawings, forming a material part of this disclosure and in which-Figure 1 is a perspective view showing a scratch gage made in accordancewith the invention.

Fig. 2 is a vertical sectional view taken through the center of thesame.

F ig. 3 is a transverse sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a partial side elevational and sectional view showing amodified form of the scratch carrying bar.

Fig. 5 is a perspective view showing the clanp plunger used inconnection therewith, an

Fig. 6 is a transverse sectional view, similar to Fig. 3, but showing amodification of construction.

In carrying out the invention use is made of a plate 10, which may berectangular, circular or of any other desired contour, and formedintegrally therewith is a transverse cylindrical extension 11, its axisbeing parallel with the face of the plate 10, while extendingrearwardly, at a right angle from the extension 11, is a smallercylindrical extension 12, through which is a central bored opening 14the same extending through the plate 10, and adapted to receive a roundbar 15, which may be graduated, as indicated at 16, its entire lengthand screwthreaded at one end to receive a screw 18, the head 19 of whichserves to clamp a disk 20, the same being formed with a beveled markingperiphery.

The cylindrical extension 11 contains a circular recess 22 to which isfitted a plunger 23, so as to slide freely therein, the plunger havingan elongated slot 24, through which the rod 15 freely passes, a part ofthe plunger 23 extending beyond the end of the cylindrical extension 11,so as to be pressed inwardly by the thumb when it is desired to adjustthe bar or by mechanical means if preferred.

Set in the inner end of the plunger 23 is a screw 25, and encircling thehead of the screw is a coiled compression spring 2G, one of its endspressing the plunger 23 normally outward while the other end abutsagainst the inner or bottom portion of the recess 22.

The point of the screw 25 is preferably made concave so as to obtain anefficient grip or bite upon the rod 15 holding it, under pressure of thespring, in an adjusted position, movement being effected by pressing theplunger inward and then slidinG the bar 15 as may be desired.

In the foi-1n shown in Fig. l, the outer surface of the bar iscorrugated, knurlcd or otherwise rougheued, as at 2S, thereby :1ffordinga better grip for the point of the screw to prevent it from movinglongitudinally when in adjustment.

In the modification shown in Fig. G, the screw 25 is formed with a sharpconical point 25', adapted to engage in a V shaped groove 15 formedlongitudinally in the rod 15, acting as a key and preventing the rodfrom turning as well as holding it in adjustment.

From the foregoing it will be seen that an eliicient, neat and easilyoperated device for marking has been disclosed, which always presents asubstantially sharp niarklng edge on the beveled disk 20, which can beremoved and sharpened and replaced in an obvious manner, whileadjustment of the bar 15, relative to the body. is easily accomplishedby pressing the plunger 23 and moving the bar so as to register anydesired distance between the base 10, and periphery the disk 20 in amanner which will be clearly apparent.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is-

1. In a scratch gage, the combination with a bod havin a cylindricalextension, of a bar shdable t rough said extension and said body, amarking device carried at one end of said bar, a plunger having a slotthrough whivh said har freely passes, and a spring fixed in said bodyadapted to press said plunger normally outward.

Q. In a srrateh gager` the combination with a body having a face plateand an eXtension opposite to said face plate, said body containing alongitudinal passage at a right angle to Said face plate, and atransverse opening parallel to said face plate, of a bar adapted toislide through the mentioned passage, a circular disk having a sharpenedperiphery removably engaged at one end of Said bar, a plunger :sliduhleiu he transverse opening formed in said body.` I@aid plunger having anelongated rereSS through which said bar may pass, a Screw iixed in theinner end of said plunger, Said Screw having a point adapted to Contactwith said bar, and a Spring in said recess eneireling the head of saidscrew, adapted to press said plunger nominally outward causing saidscrew to engage with said bar.

In testimony whereof I have affixed niy si gnature.

J SEIH LIPPERT.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

